Rubber snubber spring



May 5, 1936@ E. w. WEBB RUBBER SNUBBER SPRING Filed June 25, 1934 M/ 74KW l 5y kmAormegf Pant ard @ar ilrncir ilompany, Chicago, mi., a corpc ration ci New rLiersey Appication .Enne 23, 31934, Semi Nn., 732,69@

@Claims This invention relates to snubber springs which, although capable of dierent usages, are particularly adapted for use in car trucks.

It is the general object of this invention to provide novel and improved snubber springs of cheap and simple construction and including resilient rubber pads, which snubber springs will have the function of breaking down the natural harmonic action of steel springs that may be used therewith. y

Another object is to provide a novel and improved snubber spring including a plurality of rubber pads constructed-and arranged to permit of the dissipation of heat from the pads as they are compressed and also permitting the deformal5 tion of the pads under compression.

The objects and advantages of the present invention will more fully appear from the following description, made in connection with the accompanying drawing, wherein like reference characters refer to the same or similar parts throughout the various views and, in which,

Fig. l is a transverse section through a portion of a ear truck wherein Aa snuhber spring of the invention is utilized; Y v

Fig. 2 is a view partly in side elevation-an partly in vertical section through one of the snubber springs;

Figs. 3 and 4 are respectively transverse sections taken on the lines 3-3 and 4 4 of Fig. 2, as indicated by the arrows; and

Fig. 5 is a view in sideV elevation illustrating one of the parts of the snubber spring.

Referring to the drawing, thereare illustrated certain parts of a car truck including the side frame 6 having a lateral opening i between the compression and tension members thereof. One end of a spring plank 8 fits within the opening 1 and rests on the tension member of the side frame between the columns deiined by theV opening 1 and restingpn this end or the spring plank is a. spring plate 9. One end of a truck bolster I0 extends into the opening 1 and this bolster is provided with roller seats il on its under surface receiving the upper parts of lateral motion rollers i2. These lateral motion rollers |2are received at their lower portions within roller seats I3 formed on a combination spring cap plate and roller seat Il. interposedv between the spring cap plate and roher seat M and the plate 9 are a number of coiled springs S which may include single coils' as illustrated, ordouble coils, while also interposed betwn these same` parts is one or more snubber springs .e ci the invention. Y

Each snubber spring A includes a pair of caps 55 l5 disposed in opposltely opposed spaced relation and each of these caps is provided with an open topped chamber i 5a having communication with the atmosphere through openings i521 in the walls of the cap. Each cap also has openings idc communicating with the chamber i5a and projecting through inwardly projecting bosses idd.

The caps i5 are preferably of cylindrical shape f as shown.

interposed between the two caps l5 and dis posed in alined relation are a plurality of cyllnlo drical-shaped pads i6 composed of rubber having a high load capacity and required resiliency when under load. Circular metal disks il are interposed between adjacent pads i6 and also between caps l5 and the pads i6 most closely adjacent l5 thereto. The 'pads l5 and disks Il are preferably assembled in groups, two groups being shown in the particular embodiment illustrated. The three upper pads IB together with the four upper disks l1 compose one group, while the three lower 20 pads i6 and the four lower 'disks l1 compose the second group. The disks I1 of each group are secured to their adjacent pads iB as by vulcanizing them thereto. Between the upper and lower group of pads and disks there isvinterposed a 25 spacing disk I8, this disk bearing upon the lower disk il of the upper group and the upper disk 'l of the lower group.

All the various pads I6 and disks l l have alined central openings therethrough and a tube I9 30 passes through these openings and also through truncated conical openings in the two caps l5. The ends of this tube I9 are swedged outwardly at 20 to bear against the walls of the truncated conical openings in the caps and thereby limit the extreme movement of the two caps away from each other.

Circumferentially and radially spaced openings I 6a, are provided in the pads I6 and correspondin'g openings ila are provided in the disks l1. 4g The openings ita and lla are alined to provide continuous openings through the pad and disk structures and the bosses ld of the caps I5 are received within the upper portions of these open ings so that the openings lic will communicate therewith. The openings (6a and Ha of the upper group of pads and disks are held in alinement with the similar openings in the lower group of the pads and disks by means of the disk'l8 which is provided with up and down turned apertured bosses Ia received respectively within certain of the openings Ila of the lower plate I1 of the upper group and within certain of the open ings lla of the upper plate l1 of the lower group.

Surrounding the structure formed by the caps compression. Also the heat generated by the i compression of the pads I6 may carry oi throughl I5, pads I6, I1 and I8 and tube I9 is a coiled compression spring 2| which is interposed between the plate 9 and the spring cap and roller seat I4.

In use, as the snubber spring A is placed under increased compression, the rubber pads I6 will compress and the openings IIa and I'Ia will aiord space for deformation of the pads under the openings Isa, I'Ia, I5c, chambers I5a and openings I5b. The pads I6 will have a different natural harmonic action than the spring 2| and the springs S of the car truck and as the pads I6 must compress asthe springs 2| and S compress the natural harmonic action of the springs 2| y and S will be broken down, so that the action of these springs will be snubbed. This will stabilize the car truck and give the same much smoother riding qualities than would be the case if the snubber spring or springs of the presentv invention were not provided in the car truck. As the disks I 'I are vulcanized to adjacent pads I6 and as the various openings through the pads and disks are maintained in4 alinement at all times, there is no danger of the development of frictional heat in the pads to an injurious extent as the pads are compressed.

The snubber device of the present invention is of cheap and simple construction'. The caps I5, pads I6, disks I1 and I8 and tube I9 may be installed as a unit in replacement for the inner coil of a standard A. R. A. double coil railway car truck spring.

It will, of course, be .understood that various changes may be madein the form, details, ar

cent pads and attached thereto, said pads, plates and caps having-alined openings therethrough for the dissipation of heat, said caps having air passages affording communication between said openings and the air surrounding said caps and a coiled spring encircling said pads and plates.

2. A snubberlspringcomprisinga pair of caps having internal chambers cbmmunicating with the exterior surfaces of said caps, a plurality of rubber pads'interposed between said two caps, metal plates interposed between adjacent pads and connected thereto, said pads, plates and caps having alined apertures communicating with said chambers of said caps and permitting the dissipation of heat from said pads under compression as well as permitting Adeformation of said pads.

3. A snubber spring comprising a pair of oppositely opposed cylindrical caps, a plurality of cylindrical rubber ".pads interposed between said caps, a'plurality of circular metal disks interposed between adjacent pads and between'said caps and pads most adjacent thereto. said pads and disks having a plurality vof alined radially spaced and circumferentially spaced openings therethrough and said caps having air passages extending through their external walls and communicating with said openings.

4. A snubber spring comprising a pair 'ot oppositely opposed caps, a plurality of cylindrical rubber pads interposed between said caps, a plurality oi metal plates interposed fbetweenadjacent pads and between caps and pads adjacent thereto, said pads and plates having ,alined openings therethrough permitting the dissipation of heat and deformation of said pads under compression, said caps having air passages through their external walls communicating with said openings and means limiting the spacing between said caps. Y 5. A snubber spring comprising a pair of oppositely opposedV caps. a plurality of rubber pads interposed between said caps, metal disks interposed between adjacent pads and between caps l nd the pads adjacent thereto, said pads and disks having alined openings therethrough, groups vof said pads and disks being vulcanized together, and means interposed between diiierent groups and maintaining the openings in the diierent groups in alinement, said caps having air passages through their -external walls communicating with said openings.

i 6. The structure dened in claim 5, and a coiled. spring surrounding said pads and disks.

EDWIN w. 

